The Tableau Extensions API is a JavaScript library that is organized into namespaces that contain the classes and methods for communicating with Tableau components. The Tableau Extensions API - library supports both dashboard extensions and viz extensions (only available in beta), although not + library supports both dashboard extensions and viz extensions, although not all interfaces and methods apply to both extensions. For an overview of how the API is organized, see Tableau Extensions API Basics.
worksheetContent provides access to the worksheet object. When you have the worksheet object, you have access to all elements in the worksheet, including the worksheets, marks, filters, parameters, and data sources. For example, to access the worksheet in a workbook (after initialization), you might have a line of code that looks like the following: const worksheet = tableau.extensions.worksheetContentworksheetContent provides access to the worksheet object. When you have the worksheet object, you have access to all elements in the worksheet, including the worksheets, marks, filters, parameters, and data sources. For example, to access the worksheet in a workbook (after initialization), you might have a line of code that looks like the following: const worksheet = tableau.extensions.worksheetContent